Mixed Sizes. Mostly multiple pieces per pound.
Local: Brazil
1. Color: As the name suggests, black tourmaline typically exhibits a deep black color, although it can sometimes have a slight brownish tint. It often occurs in long, prismatic crystals, but can also be found in massive formations.
2. Hardness: Black tourmaline has a hardness of 7 to 7.5 on the Mohs scale, making it relatively durable and resistant to scratching.
3. Clarity: Black tourmaline is typically opaque, meaning that light does not pass through it. However, some specimens may have varying degrees of translucency, where light may penetrate partially but not fully.
4. Luster: The luster of black tourmaline, like that of many minerals, can vary depending on factors such as its composition, crystal structure, and surface condition. Generally, black tourmaline exhibits a vitreous to sub-vitreous luster, which means it appears shiny and glassy.
5. Density: Its density ranges from 2.82 to 3.32 g/cm^3.
6. Metaphysical Properties: Black tourmaline is believed by many to possess strong protective energies, shielding the wearer or owner from negative energies, psychic attacks, and electromagnetic radiation emitted by electronic devices. It is also associated with grounding energies, helping to stabilize and balance one's energy field. It is thought to cleanse and purify negative energies within oneself and the environment.
Photos have not been edited or altered, just taken in different daylight conditions to show the variation in color. Pieces are held in hand to help with scale and does not necessarily represent 1 pound. Specific pieces photographed may no longer be available.